Hi GC. Thanks for the link. Here is an excerpt that raises concern for me. I will explain the concern at the bottom of the excerpt.
Quote
The spotty distribution of coarse and fine gold throughout the bedded gravels and sandy to clayey seams poses the problem of "How to sample and determine the grades of gold throughout the Cangalli deposit!".
Drilling and sampling programs have been considered to establish the grades and reserves of the Cangalli conglomerate deposit. Shallow churn drill methods have been used to estimate the gold content of alluvial material along gravel benches and beneath flood plains near rivers where abundant wa ter is available.
Such methods would appear to be impractical in deep drilling through hundreds of meters above river beds where the terrain is mountainous in relief.
Reverse circulation drilling programs into bedrock deposits usually provide representative sample cuttings for assaying. However, deep RC or diamond drilling methods to evaluate placer deposits have not been conventionally used
by others for several reasons:
(1) The spotty nature of coarse gold in placer deposits require very large samples (multiple cubic meters).
(2) Preparation and splitting of large samples containing coarse gold would require special screening and fine grinding, resulting in high costs for each sample.
(3) Drilling through gravel containing coarse cobbles adjacent to fine sand, silt and clays would probably not collect representative samples for assaying.
(4) Deep drilling (greater than 300 meters) through conglomerate would require extensive casing, and would be costly.
ENQUOTE
Problem. They state that there is little to no drilling that has been done on this property. They also state that :
Quote "Drilling through gravel containing coarse cobbles adjacent to fine sand, silt and clays would probably not collect representative samples for assaying.
Deep drilling (greater than 300 meters) through conglomerate would require extensive casing, and would be costly."Enquote
Yet dimensionalize the field in 3 dimensions with no supporting data to get 100 million ounces +
Quote "The enormous size of this placer deposit is indicated by its dimensions within the Tipuani basin, ranging in length up to 25 km (15 miles), average width of 25km (1.5 miles) and approximate thicknesses of 500 to 2500 meters (1,640 to 8,200 ft).
Question
Assuming their is no controversy in the stated 25km x 2.5km, how do you rationalize their 500 to 2500 meters in thickness(depth) without drilling?
Statement
If I trench in the lowest part of the property, all over the property, would I not expect the highest readings of placer, on the property? Yes!
If I trench too 12 feet in depth (1 meter wide trench), which is 4 tons deep x 1 meter wide, assuming 1 cubic meter = 1 ton, could I produce an average grade across the property, with multiple trenches NO!
If I trench in numerous places over the property could I ever dimensionalize the 3rd dimension as 500 meters to 2500 meters? Categorically and equivocally NO!
There are many unaswered questions, this is not quite as cut and dry as some may think!
the Chief
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